Locking device



FIG. 1 is a perspective view of a locking device showing our new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view of the locking thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is a left side view thereof.

The broken lines shown herein are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a locking device, as shown and described. 